MATEC Web Conf.
Volume 346, 2021International Conference on Modern Trends in Manufacturing Technologies and Equipment (ICMTMTE 2021)
|Number of page(s)||6|
|Published online||26 October 2021|
The Stability of Laser Hardening Structures to Softening During Heating
1 Don State Technical University, Physical and Applied Materials Science Department, Gagarin Sq.,1, Rostov-on-Don, Russia, 344000
2 Don State Technical University, Scientific-Technical Translation Department, Gagarin Sq.,1, Rostov-on-Don, Russia, 344000
3 Kiev College of Mechanics and Technology, Metallurgy and Materials Science Department, Kharkiv Hwy.,15, Kiev, Ukraine, 02090
* Corresponding author: firstname.lastname@example.org
Structural and phase changes occurring in laser-hardened steels after tempering at different temperatures are considered. It is shown that the optimization of laser processing and subsequent tempering allows to increase the heat resistance of steels 50-120°C by maintaining a high density of defects in the crystal structure and appearance of the uniform allocation of dispersed carbide particles. It is established that for the laser-irradiated metal, from the energy point of view, it is not the formation of ε-carbide during tempering, but the deposition of carbon atoms and alloying elements on structural imperfections with further formation of carbides according to the scheme: carbon in solid solution → carbon associated with defects → carbide on defects of the crystal structure.
© The Authors, published by EDP Sciences, 2021
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